Function to build social icon list for wordpress

social_Icon_function.php

<?php
/**
 * Output social icons for a post.
 * Assumes you have filters for building share URLs named build_twitter_url & etc.
 * @param  integer $post_id: the id of the post
 * @param  string  $classes: a space-separated list of classes to add to the section
 * @param  boolean $circled: use circled icons
 * @return string HTML section containing the list of icon links
 */
public function social_icons( $post_id = NULL, $classes = '', $circled = FALSE )
{
	//for showing more than one on a page
	static $output_id = 0;
	$output_id++;

    //Make sure we have the post ID to reference when sharing
	if ( ! $post_id )
	{
		$post_id = get_post()->ID;
	}//end if

    //List of social networks we want icons for
	$social_networks = array(
		'twitter',
		'facebook',
		'linkedin',
		'reddit',
		'googleplus',
		'email'
	);

	?>
	<section id="post-header-post-social-<?php echo absint( $output_id ); ?>"
	 class="post-social <?php echo esc_attr( $classes ); ?>">
		<ul class="social">
		<?php
		foreach( $social_networks as $network ) {
			?>
			<li class="<?php echo esc_attr( $network ); ?>">
				<a href="<?php echo esc_url( apply_filters( 'build_' . $network . '_url', $post_id ) ); ?>"
				 title="Share on <?php echo esc_attr( ucfirst( $network ) ); ?>"
				 class="icon-<?php echo esc_attr( $network ); ?><?php if( $circled ) { echo '-circled'; } ?>"></a>
			</li>
			<?php
		}//end foreach
		?>
		</ul>
	</section>
	<?php
}//end social_icons
?>

Created as a sample.
Assumes WordPress.
Assumes there are filters in place for url building.
Assumes two types of icons - "round" and another.